New to MESA

racedirector wrote: Thank you guys, really helpful. I am about to install the 5i25 as I received the cards today and then I'll be able to visually see whats available to me!

Awesome, great to see another Aussie to the Mesa ecosystem. Prepare to be surprised with the performance you will get out of your steppers! My maximum expected RPM doubled....

Really looking forward to that aspect, I can actually run at 1000ipm now (and that is bloody scary!!) but expect things to be smoother. Hoping it is like going from Mach 3 to Linuxcnc only better

If you need really small power only for some switches or an electronic Handwheel, than you can simply misuse the connector P3 in the bottom left of the board, or maybe better you take one of the 5V + ground connectors from one of the stepper or the encoder connector.

I think I stuffed my 7i76!

Made up a cable with 25 pin IDC connectors to get the 7i76 outside my control box. When I plugged it in the 7i76 had some smoke escape and it looks the the U9 chip was the culprit. Anyone know what U9 is used for on the card and if, by chance, the card is still usable? If not can they be repaired because if not it was an expensive bloody cable stuff up.

Yes, if you happened to build the cable with one connector reversed and set up the
5I25/6I25 to supply 5V power to the 7I76, U9 and U12 could be damaged

We can fix this, just request RMA # from Mesa

I have the 7i76E, on it U9 is the EEPROM by the looks of it, PCW is the man to help here, but he is moving at the time so he must be busy.
Anyway, if that is the said EEPROM, something was very wrong with that cable, as it must have had plenty of power going BACK to 7i76.
Would suggest waiting a bit for PCW to chime in.
Regards,
Tom

And here he is!
Thank you Peter.